package main

import (
	"fmt"
	"unsafe"
)

func main() {
	var n1 = 100
	fmt.Printf("n1 的类型是： %T\n", n1)
	var n2 int64 = 10
	fmt.Printf("n2 的 类型 %T, n2占用的字节数是 %d\n", n2, unsafe.Sizeof(n2))
	var age byte = 90 
}